CN102879028A

CN102879028A - Adaptive magnetic fixture for ultrasonic detection sensors

Info

Publication number: CN102879028A
Application number: CN2012103813993A
Authority: CN
Inventors: 徐春广; 李骁; 潘勤学; 肖定国; 徐浪; 郭军; 宋文涛
Original assignee: Beijing Institute of Technology BIT
Current assignee: Beijing Institute of Technology BIT
Priority date: 2012-10-10
Filing date: 2012-10-10
Publication date: 2013-01-16

Abstract

The invention relates to an adaptive magnetic fixture for ultrasonic detection sensors. The adaptive magnetic fixture aims to solve problems that measuring staff cannot fix sensor devices by hands for a long time, thicknesses of coupled layers of sensors and measured workpieces are inconsistent due to factors such as shaking of the hands of the measuring staff, and the sensors are inconvenient to fix at crevice positions inside complicated mechanisms in the field of traditional ultrasonic nondestructive testing. The magnetic fixture is small in size and convenient to operate. Adjustable and stable pre-tightening force can be provided by the fixture, the fixture brings convenience for measuring staff, measurement efficiency is improved, operation is simplified, and the adaptive magnetic fixture is adaptive to overall dimensions of various ultrasonic sensors with different sizes, and has a wide application prospect.

Description

A kind of Ultrasonic Detection sensor self-adaptation magnetic jig

One, technical field

The present invention relates to a kind of Ultrasonic Detection sensor self-adaptation magnetic jig.This device volume is small and exquisite, lightweight, can regulate as required the magnetic adsorptive power size, the link of fixing, be installed that can be widely used in sensor in the Ultrasonic NDT, solved because of long-time detect or detecting position be equipped with the sensor that specific (special) requirements causes can't stablize fixing, the problems such as coupling effect is bad, reduce measuring error, can be widely used in the various Ultrasonic NDT fields such as various ultrasonic thickness measurements, defects detection and stress detection.

Two, background technology

Traditional Ultrasonic Nondestructive application, the fixing main technician of dependence of sensor hands and by being pressed in the test specimen surface, realizes sensor surface and test specimen surface close contact, strengthens coupling effect.But because under some special occasions, Measuring Time is long or the test specimen position is special, the technician can't guarantee the abundant coupling on sensor and measured workpiece surface, causes measurement result to produce very large error even mistake, has seriously influenced the reliability and stability that detects.

Because the ultrasonic sensor specification is different, different, old clamping device generally all is that the concrete size according to sensor designs, be difficult to accomplish that a anchor clamps can adapt to the multiple sensors specification, when measurement environment needs multiple different size probe frequently to be used alternatingly, the quantity of anchor clamps own is too much, also can cause the measurement inefficiency.

China is also fewer with design about the research of ultrasonic sensor magnetic fastening device at present, many all is to be integrated in the measuring system, can't be fixed separately and use inconvenience to sensor, volume is too huge, can't satisfy the sensor pinned task of some crack position.In view of above reason, I propose a kind of design of ultrasonic nondestructive measurement sensor self-adaptation magnetic jig.

Three, summary of the invention

The purpose of this invention is to provide a kind of design of Ultrasonic Detection sensor self-adaptation magnetic jig, can't stablize the problem that the coupling layer variable thickness that causes on applying test specimen surface causes mainly for conventional ultrasound Non-Destructive Testing application sensor, because this device volume is small and exquisite, can conveniently be positioned over the inner narrow and small position of labyrinth, make things convenient for the testing staff to use, coupling layer thickness is stable when having guaranteed measurement, reduces measuring error, simplify manually-operated, improved measurement efficient.

Technical scheme of the present invention is:

A kind of Ultrasonic Detection sensor self-adaptation magnetic jig, to side shield be fixedly connected with overhead gage by interior six square bolts, top self-adaptation rubber parts is pasted in the groove of overhead gage, sidewall self-adaptation rubber parts is pasted in the side shield groove, magnet steel is pasted in the groove of two side shields bottom, forms in the lump a kind of ultrasonic nondestructive measurement sensor self-adaptation magnetic jig.During use, because top self-adaptation rubber parts and sidewall self-adaptation rubber parts have the height on thin-walled globoidal structure and top self-adaptation rubber parts and ground less than sensor height itself, distance between the self-adaptation rubber parts of two side is less than the diameter of sensor own, the thin-walled globoidal structure of two class rubber parts can change voluntarily with the sensor of different physical dimension, the in addition magnetic attraction of bottom surface magnet steel, can guarantee that a kind of ultrasonic nondestructive measurement sensor self-adaptation magnetic jig steadily is pressed on sensor the measured workpiece surface, guarantee that coupling is stable, consistent.This jig volume is small and exquisite, is easily installed in the inner crack of complex mechanism position, has reduced tester's workload, has improved measuring accuracy and has measured efficient.

Four, description of drawings

Fig. 1 is structural representation of the present invention

Fig. 2 is 3D schematic diagram of the present invention

Fig. 3 is rubber parts schematic diagram of the present invention

Description of reference numerals is as follows:

Fig. 1: magnet steel 1, side shield 2, interior six square bolts 3, overhead gage 4, top self-adaptation rubber parts 5, sidewall self-adaptation rubber parts 6

Five, embodiment

The below is elaborated to the specific embodiment of the present invention:

Among Fig. 1, by six square bolts 3 in four overhead gage 4 is fixedly connected with side shield 2, top self-adaptation rubber parts 5 and sidewall self-adaptation rubber parts 6 firmly are pasted on respectively in overhead gage 4 and side shield 2 inboard wall grooves, at last with magnet steel 1 strong bond in the groove of side shield 2 bottom surfaces, form a kind of ultrasonic nondestructive measurement sensor self-adaptation magnetic jig.During use, this jig is pressed on the sensor outside, the pretightning force that magnet steel 1 provides can guarantee the stable coupling of sensor and measured workpiece, the thin-walled globoidal structure of top self-adaptation rubber parts 5 and sidewall self-adaptation rubber parts 6 also can be along with the variation of sensor profile self-adaptation.This device has guaranteed that coupling layer thickness can not be subject to the impact that the shake of tester's hand causes, and has improved measuring accuracy, and volume is small and exquisite, can be placed on the inner crack of complex component position, simplified experimental implementation, improved measurement efficient, be with a wide range of applications.

Claims

1. a Ultrasonic Detection sensor self-adaptation magnetic jig is characterized in that: the adjustable magnet steel of bottom magnetic force, sidewall self-adaptation rubber parts, top self-adaptation rubber parts.

2. the adjustable magnet steel of bottom magnetic force according to claim 1; it is characterized in that: magnet steel magnetic force size can be regulated voluntarily according to the intensity that magnetizes; the structure of magnet steel is rectangular parallelepiped; but be not limited only to this shape; the any shape that can buy sufficient request for utilization all in this protection domain, such as circle, triangle etc.

3. sidewall self-adaptation rubber parts according to claim 1, top self-adaptation rubber parts is characterized in that: the rubber soft pliable is bent, and outstanding one side is the thin-walled globoidal structure, can bend very easily, adapts to the different sensors size.Top self-adaptation rubber parts is to the distance of the bottom surface height less than sensor, and nearest distance guarantees fully jam sensor of rubber parts less than the width of sensor between the sidewall self-adaptation rubber parts.The structure of rubber parts is not limited only to this, also can be other structure or elastic cylinders that substrate hold-down function is provided, and its material is not limited only to rubber, also can be the material of other elastomeric flexible, such as silica gel etc.